KIT34674EPEVBE评估板

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KIT34674EPEVBE评估板突出了MC34674的特性功能，是一个完全集成的为旅行充电器优化的单个锂离子和锂聚合物电池充电器应用。The few external components required include a dual-color LED for charge-status indication, a negative-temperature-coefficient (NTC) thermistor circuit for setting the charge temperature window, and two decoupling capacitors.The MC34674 tolerates an input voltage up to 28V, which allows low-cost ac/dc converters to be used for further system-cost reduction. A charge cycle of the MC34674 includes trickle, constant-current (CC) and constant-voltage (CV) charge modes. The CC-mode current is selectable from 50mA to 1.05A, with 10% accuracy and the constant-output voltage in the CV-mode is fixed at 4.2V.The MC34674 has many features such as trickle charging for a deeply-discharged battery, an internal timer for termination to prevent charging a failed battery, charger current thermal foldback for thermal protection, and smart battery-connection verification to prevent charging in case there is no battery connected. It has a 2.6V falling power-on-reset (POR) threshold, making it perfect to work with current-limited power supplies. When the charger is disabled, the BAT pin leaks less than 1?A current from the battery.FeaturesNo external MOSFET, reverse-blocking diode or current-sense resistor are required28V maximum input voltage rating with 11V over-voltage-protection thresholdFactory programmable charge currentTrickle charge for fully discharged batteries±0.4% voltage accuracy over -20 to 70°CDriving a dual-color LED and smart battery-connection verification optimized for travel charger applicationsInterface to NTC thermistor
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KIT34674EPEVBE评估板用户指南
MC34674数据手册